Apparatus for manufacturing lead traps by hydraulic pressure.



G. MERETA. APPARATUS FOR MANUFAGTURING LEAD TRAPS BY HYDRAULIG PRESSURE.

APPLICATION FILED AUG. 4, 1906. 907,077. 7 Patented Dec. 15, 1908 ll d A Z WHEN H I II PATENT oFFroE.

- iiurrnn STATES dl't'JSEPPE MERETA, or oeNoA, lIALY, ASSIGNOR TO Eh PIOMBIFERA, sooin'rA ANONIM'A. ITALIANA PER muoosrsrii DEL PIOMBO u GENERI AFFINI, or GENOA, runny, A COM LPANY.

JAJELEABLELTUS FOR MANUFACTURING LEAD TRAPS BY HYDRAULIC PRESSURE.

No. seno /v.

Application filed August 4,

To all whom it may concern:

it known that I, GrusEPPE MERETA, ject of the King of Italy, residing at enes, ltely, have invented new enduseful improvements in or Relating to Apparatus for Manufacturing Lee-d Traps by Hydraulic l. ,ssure, of whicl'i the following is a specication.

This invention relates to an apparatus for the manufacture of lead traps (siphons) by hydraulic pressure which apparatus is chiefly constituted by 3.. Two cylinders having each s pressure operated piston.

13. it. lead chamber.

it. special. velve gear for distributing the pressure on the lead.-

A simple form of construction of the appsretus is shown, by way of example, in the ac compsnying dI'ZtWll'lg.

the said drawing, Figure l is e general view of the complete apparatus, Fig. 2 e sectional plen, Fig. 3 :1 vertical section, and Fig. 4; it dot-oil view the special velve gear for liquid under pressure. will be seen on examining the drewings, the lend eliember is constituted by e chan1- her proper, inner core or die -e and a removable ring (Z- for regulating the thickness thetrep.

The object of the use of the ring-d is (ct) to facilitate the making of very nerrow curves and (h) to facilitate the separation of the residue of lead when it is desired to remove the core The inner core .e red end is erren ed in thedead chem it is held in place by it slightly con,- icol '-'0--. The core is provided with two grooves ---u-.- through which-011 so being forced .by the pistons t the leadrises to the orifice ol' the loud chamber -d tl mosite the centers of'the pistons -t-, a

lidle is provided in the core e for the purpose of being used-ass supply and compensetion'hole.

Ti lie lend chiiin'be'r-is provided with two llOlBS (Fig. 3) for introducing the leads The valve gear shown in detail in Fig. 4,"

serves to facilitate the regulation or change of pressure in the cylinders p It is contituted by two valves '-s-s-- the spindles of which are connected together by means of a. system of toothed wheels -r and opereted by means oi cranks The use of Specification of Letters Patent.

Patented Dec. 15, ieoeQ 1906. Serial No. 329,219.

toothed wheels offers the very great adventege of enabling the opening and closing of the said valves to be regulated from s moximum to a minimum.

The driving power required for working this machine is about HP for 180 atmospheres with lead at a temperature ti 150.

The operation is as to lows. the lead chamber has been properly heated lead is introduced through the holes 0, and as soon as the lead has solidified, the manufacture begins. If the valves -ss are left uniformly open, the result will be thste straight pipe will come out from the orifice of the lead chamber for both pistons will uniformly advance toward the core 0. But if oneof the valves, for instance s-, is

closed, the pipe will be bent towardsthe side of the closed valve as only the piston will then advance.

The so ply and the compensation take 13108 in t e following manner. If the right "and piston i is cut oil and consequently standing still, while the left hand piston contin'ues to work, a small portion of the lead, instead of escaping through the groove u/- on the left hand side of the core, will pass through the hole e-, and as it will meet the fixed right hand piston, it will Supplthe inner curve of the trap curvature throng the groove -'u on the right hand side of the core. the lead chamber 0' at a. constant term pereture up to one-tenth of a degree, and

the lead could be more or less liquid accord-v ing tothe degree of heat, it follows that, in :order to obtain curves or bonds not only elweysuequal, but also more or less Wide, the two cyhnders must be provided each with e discharge valve the working of which is as follows :If the right hand piston is out As soon as As it is impossible to maintain oil, that is to say, standing still, end the left hand one exercises a pressure, if the suppl r hole 2" admits an excessive quantity of fee so that the inner curve becomes too wide, ondif the discharge valve of the cylinder is opened to a greater or less extent, it will fol-- low that, under the eflort of the left hand piston, the lead supplied through the hole 2, instead of rising t 1 groove of the core 2, will force the right hand piston back, so that the supply through the I right hand groove failing, the curve will become narrower. The some thing will hnprough the rightfhcnd r other direction.

pen when the left hand piston is standing still, and the right hand one working. The working of the valve gear for regulating the hydraulic pressure on'the pistons t is very simple. ater under pressure, supplied by a pump or other suitab e means, is carried to the valves 8, s by the pipe m (Fig. 4) under a pressure varying between 150 and 200 atmospheres. If the two valves -s s are equally wide opened, water under ressure passes in equal parts into the chamliers 7c of the two cylinders p, both pistons t uniformly advance, and the lead will rise straight in the shape of a pipe. But if one valve, for instance -s, is closed, the other valve, owing to the gear connection will be opened to a greater extent, and consequently the whole pressure will be admitted into one cylinder only, the advance of one piston alone toward the core 6 thus forcing the lead pipe to bend towards the other iston. By opening the closed valve, and y closing the one that was open,- the lead pipe will be forced to bend in the By opening the valves to an equal extent, the curvature will stop at once, and the pipe will rise straight again.

In order to prevent the pistons from continuing to advance under the influence of the expansion of the air which is always contained in water, instead of stopping at'once after the closing of the respective valve, the cylinder is drained by means of a valve b which can be connected directly to 1' the pressure pipe a connecting the cylinder with its valve.

Low pressure is supplied by a pump and admitted by a ipe n to the front portion of each cy 'nde'r in order to enable the pistons t to return so as to leave disengaged the hole cthrough which lead is introduced into the chamber 0.

The filling of the lead chamber, which can be done in about 10 minutes, can be effected through the holes ---r or the orifice of the lead chamber through which the lead is forced out.

Having now fully described my said invention and the manner in which the same is to be performed, what I claim and desire to secure by Letters Patent of the United States is In an apparatus for manufacturing lead traps, the combination with a lead chamber and a core therein, of two hydraulic cylinders arranged on opposite sides of said lead chamber, a lunger projecting from each of said hydrau ic cylinders and adapted to enter said lead chamber on opposite sides thereof, means to regulate t e hydraulic pressure applied to said plungers, said means comprising two valves, gearing operatively connecting said valves, a crank connected with each of said valves to operate said gearing so as to close one valve while opening the other valve and two discharge valves (5) and cranks for operating the same.

In testimony whereof I have afiixed my signature in presence of two witnesses.

GIUSEPPE MERETA. 

